Affiliation: | aDepartment of Economics and Business, Universitat Pompeu Fabra, Ramon Trias Fargas 25–27, 08005 Barcelona, Spain;bCentre de Referència d'Economia Analítica (CREA), Spain;cDepartment of Economics, Stockholm School of Economics, Box 6501, S-113 83 Stockholm, Sweden;dCESifo, Germany |